bintools-wrapper, cc-wrapper: avoid invalid export of 'expand-response-params'

POSIX sh (and `bash`) impose a restriction on environment variable name
format and disallow hypheps in the names. Normally it's not a problem
as nothing usually tries to refer nyphenated names.

One exception is `nix develop` (https://github.com/NixOS/nix/issues/6848):

    $ nix develop -f. gcc -L
    gcc-wrapper> ...-get-env.sh: line 70: expand-response-params: bad substitution

Note that bash usually uses explicitly created `expandResponseParams`
variant of the same variable.

To work the problem around let's avoid environment variable export and move
it to `passthru` for `cc` (used ina  few places) and remove it completely for
`binutils` (does not seem to be used at all).

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/build-support/bintools-wrapper/default.nix b/pkgs/build-support/bintools-wrapper/default.nix
index cdd07d6b2efe..b54983986dbe 100644
--- a/pkgs/build-support/bintools-wrapper/default.nix
+++ b/pkgs/build-support/bintools-wrapper/default.nix
@@ -365,7 +365,7 @@ stdenv.mkDerivation {
     ##
     + extraBuildCommands;
 
-  inherit dynamicLinker expand-response-params;
+  inherit dynamicLinker;
 
   # for substitution in utils.bash
   expandResponseParams = "${expand-response-params}/bin/expand-response-params";